BME280 datasheet(16/60 Pages) BOSCH

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Bosch Sensortec | BME280 Data sheet

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Document number: BST-BME280-DS001-23 Revision_1.23_012022

time

POR

Data readout

Write

settings

Mode[1:0] = 01

time

IDDSL

IDDSB

IDDP

IDDH

POR Write

settings

IDDT

tmeasure

Mode[1:0] = 01

cycle time = rate of force mode

Figure 4: Forced mode timing diagram

3.3.4

Normal mode

Normal mode comprises an automated perpetual cycling between an (active) measurement period

and an (inactive) standby period.

The measurements are performed in accordance to the selected measurement and filter options. The

standby time is determined by the setting t_sb[2:0] and can be set to between 0.5 and 1000 ms

according to Table 27.

The total cycle time depends on the sum of the active time (see chapter 9) and standby time tstandby.

The current in the standby period (IDDSB) is slightly higher than in sleep mode. After setting the

measurement and filter options and enabling normal mode, the last measurement results can always

be obtained at the data registers without the need of further write accesses.

Using normal mode is recommended when using the IIR filter. This is useful for applications in which

short-term disturbances (e.g. blowing into the sensor) should be filtered. The timing diagram is shown

below:

time

IDDSL

IDDSB

IDDP

IDDH

POR

Mode[1:0] = 11

Data readout

when needed

Write

settings

tstandby

IDDT

tmeasure

cycle time = tmeasure + tstandby

Figure 5: Normal mode timing diagram

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